I've changed the hard disk on my computer

WD External Drives External Drives for PC
1

I have a WD passport which takes a backup of my files every hour. Two weeks ago, I changed the hard disk on my computer. WD backup still backups my file according to the date of last backup, but if I try to restore a file, no files appear in the list so I can’t select the file that I want. Can someone help me please?